云南局限蚊一新种（双翅目：蚊科）

A NEW SPECIES OF TOPOMYIA FROM YUNNAN PROVINCE, CHINA(DIPTERA:CULICIDAE)

本文记述采自西双版纳励腊县，原始森林中的局限蚊属一新种，双叉局限蚊Ｔｏｐｏｍｙｉａ（Ｔｏｐｏｍｙｉａ）ｂｉｆｕｒｃａｔａｓｐ．ｎｏｖ．。新种主要特征是雄蚊抱肢端节在亚端部分为内、外两校，与马来西亚产的Ｔｏｐｏｍｙｉａ（Ｔｏｐｏｍｙｉａ）ａｅｎｅａＴｈｕｒｍａｎ，１９５９很相似，但新种外分枝端部具粗而长的刺毛，抱肢基节、阳茎、腹节Ⅸ背板等均有显著区别。

Topomyia (Topomyia) bifurcata sp. nov.(figs.1-4)Only males are known. Proboscis 0. 9 of the length of fore femur;dark brown, with a hasal region corresponding to the length of palpi mainly yellow;hasal 1/5 with yellow longitudinal line ventrally. Anterior and posterior pronotal lobes covered with broad flat silver scales. Femora, tibiae and tarsi dark brown, only hasal 1/3-2/3 of femora with yellow longitudinal lines on the ventral sides.Ninth tergal lobes inconspicuous, each with 4--5 strong setae, none between lobes.Ventro-apical lobe absent. ixstimere bifurcatedl inner branch with a prominent claw at thetip, outer branch with 3-4 long setae apically.Ventral lobe of claspette hairy, with a pair oflong setal apically I dorsal arm well--developed, with a long setae subapically, which is somewhat expanded at the hasal part.The new species is readily distinguished from the other members of the subgenus by the shape of the distimere and claspette.Holotype, partypes ; collected from Mengla(21.4°,101.5°E),Yunnan Province, China, Oce. 1984, by Dong and Wang; the holotype and one of the paratypes are deposited in the Yunnan Institute of Malaria Control, another in the Institute of Microbiology and Epidemiology.